The paper aims to relieve the wrinkle issue in production of flexible packaging laminating films. Based on the existing film winding tension model, the internal tension of composite film was analyzed; and a piecewise tension winding model with winding diameter Ri=1.5R0 as the cut-off point was established. Setting the winding tension according to the model can avoid the problems of the existing winding tension model, such as weak point of tension and excessive internal tension, and can effectively reduce the influence of unstable factors such as equipment and materials, to effectively reduce the wrinkling issue. By using the optimized tension winding model and through long-term and massive production practice, the loss rate of wrinkle is statistically reduced from 5% to <1%, which significantly relieves the wrinkle issue and brings the company more than 2 million yuan of annual economic benefits.